Re: [Boost-users] [lambda] Using lambda expressions with STL function adaptors

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-07-19 00:31:46

AMDG

Robert Jones wrote:
> Gives a compiler error, which I think tells me that my lambda 
> expression, _1 == 3
> does not provide the argument_type typedef. I thought lambda 
> expressions were
> careful to to do this. What am I doing wrong?

Lambda can't provide argument_type typedefs in general.

Consider the following:

(_1 == 3)(1.0)
(_1 == 3)(10)

Both of these are legal.  The same function object
can be called with either a double or an int.  There is
no unique argument type.

In Christ,
Steven Watanabe